Active material, nonaqueous electrolyte battery, battery pack and vehicle

Patent metadata

Field	Value
Publication number	US-2017077499-A1
Application number	US-201615260974-A
Country	US
Kind code	A1
Filing date	Sep 9, 2016
Priority date	Sep 16, 2015
Publication date	Mar 16, 2017
Grant date	—

Abstract

According to one embodiment, there is provided an active material. The active material includes secondary particles. The secondary particles include first primary particles and second primary particles. The first primary particles include an orthorhombic Na-containing niobium-titanium composite oxide. The second primary particles include at least one selected from the group consisting of a carbon black, a graphite, a titanium nitride, a titanium carbide, a lithium titanate having a spinel structure, a titanium dioxide having an anatase structure, and a titanium dioxide having a rutile structure.

First claim

What is claimed is:

1 . An active material comprising secondary particles comprising:
first primary particles comprising an orthorhombic Na-containing niobium-titanium composite oxide; and second primary particles comprising at least one selected from the group consisting of a carbon black, a graphite, a titanium nitride, a titanium carbide, a lithium titanate having a spinel structure, a titanium dioxide having a anatase structure, and a titanium dioxide having a rutile structure.

2 . The active material according to claim 1 , wherein the orthorhombic Na-containing niobium-titanium composite oxide is represented by a general formula of Li 2+v Na 2−w M1 x Ti 6−y−z Nb y M2 z O 14+δ and in the general formula, M1 is at least one metallic element selected from the group consisting of Cs, K, Sr, Ba, and Ca, M2 is at least one metallic element selected from the group consisting of Zr, Sn, V, Ta, Mo, W, Fe, Co, Mn, and Al, and 0≦v≦4, 0<w<2, 0≦x<2, 0<y≦6, 0≦z≦3, and −0.5≦δ≦0.5.

3 . The active material according to claim 1 , wherein the second primary particle includes at least one selected from the group consisting of the lithium titanate having the spinel structure, the titanium dioxide having the anatase structure, and the titanium dioxide having the rutile structure.

4 . The active material according to claim 1 , wherein an average particle size D A of the first primary particles is smaller than an average particle size D B of the second primary particles.

5 . The active material according to claim 1 , wherein an average particle size D A of the first primary particles is equal to or larger than an average particle size D B of the second primary particles.

6 . The active material according to claim 5 , wherein a ratio of D A /D B is within a range of from 2.5 to 10.

7 . The active material according to claim 1 , which is used for a battery.

8 . A nonaqueous electrolyte battery comprising:
a negative electrode comprising the active material according to claim 1 ; a positive electrode; and a nonaqueous electrolyte.

9 . The nonaqueous electrolyte battery according to claim 8 , wherein the positive electrode comprises at least one selected from the group consisting of a lithium cobalt composite oxide, a lithium-nickel-cobalt-manganese composite oxide, a lithium-manganese composite oxide having a spinel structure, and a lithium-iron-manganese composite phosphate compound having an olivine structure.

10 . A battery pack comprising the nonaqueous electrolyte battery according to claim 8 .

11 . The battery pack according to claim 10 , further comprising:
an external power distribution terminal; and a protective circuit.

12 . A battery pack comprising nonaqueous electrolyte batteries, each of the nonaqueous electrolyte batteries comprising:
a negative electrode comprising the active material according to claim 1 ; a positive electrode; and a nonaqueous electrolyte; wherein the nonaqueous electrolyte batteries are connected in series, in parallel or with a combination of series connection and parallel connection.

13 . A vehicle comprising the battery pack according to claim 10 .

14 . The vehicle according to claim 13 , wherein the battery pack is configured to recover a regenerative energy caused by a power of the vehicle.

Assignees

• Toshiba Kk

Inventors

• Hoshina Keigo
• Harada Yasuhiro
• Takami Norio

Classifications

• H01M4/131

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M4/364 Primary

  as mixtures · CPC title

• H01M2200/10

  Temperature sensitive devices · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M2/348

  Electricity · mapped topic